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7614352 |
In-situ capture of carbon dioxide and sulphur dioxide in a fluidized bed combustor
Both a process and an apparatus whereby a fuel with both a high carbon content, a relatively high sulphur content and a relatively low ash content, can be combusted without the release of...
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7550127 |
Method for reducing exhaust carbon dioxide
A method for effectively absorbing and removing CO 2 in an exhaust gas generated during an industrial process for reducing the amount of CO 2 that is exhausted into the atmosphere. The exhaust...
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7504000 |
Method for producing a sheet of paper comprising calcite
The invention relates to a method for producing a sheet of paper ( 6 ) comprising paper fibres and calcium carbonate mainly in the form of calcite crystals linked directly to the paper fibres. The...
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7501107 |
Method for obtaining precipitated calcium carbonate particles of nanometric scale structure
Process for the production of precipitated calcium carbonate particles, structured at the nanoscale, by carbonation of milk of lime in the presence of a crystallization controller selected from the...
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7387769 |
Method and apparatus for continuous gas liquid reactions
A method and apparatus for improving contact between a liquid and a reactant gas by moving the liquid in a serpentine path that moves horizontally and vertically through individual chambers or...
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7378073 |
Lime treatment
Methods of obtaining a solution of calcium ions from lime (e.g. carbide lime) are disclosed. In one aspect the method comprises (i) treating the lime with an aqueous solution of a polyhydroxy...
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7371356 |
Method for the production of precipitated calcium carbonate with a high degree of brightness
Calcium carbonate with high brightness is prepared by treating calcium carbonate and/or the milk of lime used for its preparation by reacting milk of lime with carbon dioxide and/or at least one of...
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7361324 |
Precipitated calcium carbonate
A method for forming calcium carbonate is provided, the method comprising the steps of: (a) milling calcium hydroxide; (b) providing a reactor vessel containing a slurry of the milled calcium...
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7303794 |
Ink jet recording paper
A thermal ink jet recording paper, incorporating dewatered and milled precipitated calcium carbonate (“PCC”) is disclosed. Precipitated calcium carbonate is dewatered and milled in the presence...
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7135157 |
Process for the production of platy precipitated calcium carbonates
A process for the preparation of platy precipitated calcium carbonate comprising the steps of providing a suspension of calcium hydroxide, carbonating the suspension of calcium hydroxide, adding a...
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7128887 |
Platy precipitated calcium carbonate synthesis method
A process for the preparation of platy PCC comprising the steps of providing a suspension of calcium hydroxide, carbonating the suspension of calcium hydroxide, adding a condensed phosphate to the...
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7097819 |
Method for producing calcium carbonate
Calcium carbonate in the form of aragonite crystals suitable for use as a filler for papermaking to give useful properties for bulk, whiteness, opacity, wire abrasion and yield is obtained by...
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7060127 |
Silica-calcium carbonate composite particles
Silica-calcium carbonate composition particles having the characteristics of both synthetic silica and calcium carbonate are described along with paper having the particles internally filled...
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7048900 |
Method and apparatus for production of precipitated calcium carbonate and silicate compounds in common process equipment
A method and apparatus for the production of calcium carbonate and calcium silicate in common superatmospheric reactors. Multiple reactors can be provided for switching production between reactors,...
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6994839 |
Carbonate recycling in a hydrogen producing reaction
A process for producing hydrogen gas from a reaction of an organic substance and a base with a recycling of a carbonate or bicarbonate by-product and a regeneration of the base. In one embodiment,...
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6991677 |
Titanium dioxide-calcium carbonate composite particles
Titanium dioxide-calcium carbonate composite particles capable of realizing characteristic properties inherent in titanium dioxide such as a high opacity, a process for producing the same, and a...
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6808700 |
Dentrifice comprising calcium carbonate granules
A dentrifice comprising granules consisting essentially of calcium carbonate particles, the granules having an average size of 50 to 500 um and a crushing resistance of 1 to 20 g/granule, and the...
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6790424 |
Process for generation of precipitated calcium carbonate from calcium carbonate rich industrial by-product
An environmentally friendly process for the production of precipitated calcium carbonate suitable for industrial application from a calcium carbonate-rich by-product of a nitrophosphate fertilizer...
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6761869 |
Process for preparing precipitated calcium carbonate
According to the process, limestone is burned at a high temperature to form calcium oxide and, thereafter, calcium carbonate is formed from calcium oxide in the presence of water and carbonate ions...
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6699318 |
Process for preparing and modifying synthetic calcium carbonate
The present invention concerns a process for preparing calcium carbonate pigment from calcium oxide and/or calcium hydroxide and carbon dioxide in the presence of water. According to the invention,...
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6685908 |
Precipitated aragonite and a process for producing it
Disclosed is a novel form of particulate precipitated aragonite calcium carbonate and a novel process for producing it.
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RE38301 |
Paper coating pigments, their production and use
There is disclosed a method for the preparation of a precipitated calcium carbonate (PCC) for use as a pigment in paper coating compositions, the method comprising the steps of (a) carbonating an...
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6623555 |
Composite precipitated calcium carbonate/silicon compound pigment and method of making same
A method of making a composite pigment of precipitated calcium carbonate (PCC) and a silicon compound, in which the resulting composite pigment is endowed with an excellent combination of optical...
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6602484 |
Precipitated calcium carbonate and method for the production thereof
The invention concerns precipitated calcium carbonate products containing polynuclear regular agglomerates having a number of calcium carbonate particles (aggregates) attached to each other and...
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6500400 |
Process for preparing precipitated calcium carbonates
A process comprising introducing CO 2 into milk of lime, in which the milk of lime is first ground, and then the CO 2 is introduced to precipitate the calcium carbonate.
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6479029 |
Micronized alkaline earth metal carbonate
The invention concerns a micronized alkaline earth metal carbonate prepared with or without the use of an agent preventing crystal growth, and a process for its preparation and use. The prepared...
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6475459 |
Process for preparing calcium carbonate particles
The invention is related to a method for forming calcium carbonate. In the method, calcium oxide is reacted with carbonate ions in the presence of water to produce calcium carbonate. According to...
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6416727 |
Apparatus and process for the preparation of precipitated calcium carbonate
A process and an apparatus for the preparation of precipitated calcium carbonates calcium hydroxide using gaseous carbon dioxide, whereby the carbonation is performed in a gaseous phase by mixing...
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6402824 |
Processes for preparing precipitated calcium carbonate compositions and the products thereof
Processes for making high quality PCC compositions, and the resulting PCC products thereof. A precipitated calcium carbonate (PCC) composition is prepared by a process comprising the step of wet...
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6362261 |
Methods of preparing cationic layer compounds, cationic layer compounds prepared thereby, and methods of use therefor
A method of preparing a modified cationic layer compound which includes providing a layer compound of the general formula (I): [E e Z z D d V v (OH − ) x ](A n− ) a .qH 2 O (I) wherein E...
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6294143 |
Process for the preparation of discrete particles of calcium carbonate
A product and a process for the preparation of discrete calcium carbonate particles that result from preparing an aqueous calcium carbonate slurry containing carbohydrates, carbonating the aqueous...
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6261530 |
Cationic layer compounds, production and use
A process for stabilizing a halogen-containing plastic against thermal or photochemical degradation by adding to the plastic an additive consisting essentially of cationic layer compounds...
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6251356 |
High speed manufacturing process for precipitated calcium carbonate employing sequential perssure carbonation
A process for the production of precipitated calcium carbonate. A slurry of calcium hydroxide is agitated in a pressurized reactor, and carbon dioxide is provided under pressure to the reactor to...
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6221146 |
Method for the production of precipitated calcium carbonate having a selected crystal form, products produced thereby and their uses
A method of producing a precipitated calcium carbonate (pcc) product which has a coarse crystalline form which comprises the steps of: (a) preparing a suspension in an aqueous medium of calcium...
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6190633 |
Process for preparing calcium carbonate
Inexpensive spindle- or needle-like calcium carbonate giving useful properties for bulk, brightness, opacity, wire abrasion resistance and yield as a paper filler is provided by taking advantage of...
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6156286 |
Seeding of aragonite calcium carbonate and the product thereof
Fine-grained aragonite precipitated calcium carbonate is produced on a commercial scale by seeding with a coarse-grained aragonite precipitated calcium carbonate. The coarse-grained seeding...
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6143065 |
Precipitated calcium carbonate product having improved brightness and method of preparing the same
A method of significantly improving the brightness and shade properties of a high quality PCC product. The method includes providing a calcium containing feed source that contains discoloring...
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6066606 |
Blooming type cleaning compositions including a system of amphoteric and nonionic surfactants
The blooming type, hard surface cleaning concentrate compositions according to the invention comprise the following constituents: 0.1-10% wt. of a terpene containing solvent which desirably...
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6036933 |
Calcium carbonate precipitation method
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5997833 |
Apparatus and process for purifying highly impure calcium hydroxide and for producing high-value precipitated calcium carbonate and other calcium products
A solution process for the purification of calcium hydroxide, particularly from hydrated carbide lime, which is subsequently used as a feed stock for a high-value calcium product, preferably...
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5993772 |
Method for coproducing calcium carbonate and sodium hydroxide
Process for the coproduction of calcium carbonate and sodium hydroxide, comprising causticizing sodium carbonate with milk of lime; separating the calcium carbonate and the sodium hydroxide...
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5939036 |
Manufacture of precipitated calcium carbonate
A method for the manufacture of precipitated calcium carbonate from impure calcium oxide of improved colour is disclosed. The method comprises admixing impure calcium oxide with an aqueous solution...
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5938969 |
Fire suppressant powder
A fire suppressant powder with particle sizes less than 5 μm is made by a chemical reaction between a gas or vapour of a first material and a vapour or an aerosol of a second material. For example...
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5910214 |
Process for preparing calcium carbonate
A process for producing calcium carbonate particles having an average size of 0.3±0.1 μm, the process comprising the steps of preparing light calcium carbonate particles of 0.6±0.4 μm in...
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5846500 |
Process for purifying highly impure calcium hydroxide and for producing high-value precipitated calcium carbonate and other calcium products
A solution process for the purification of calcium hydroxide, particularly from hydrated carbide lime, which is subsequently used as a feed stock for a high-value calcium product, preferably...
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5822220 |
Process for controlling the efficiency of the causticizing process
Continuous measurements are made of a characteristic of the individual components of green liquor fed to a slaker and white liquor exiting from the slaker. The liquor component measurements provide...
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5811070 |
Process for producing calcium carbonate particles having a size of 0.1 to 1.0 μm
A process for producing calcium carbonate particles having an average size of 0.1 to 1.0 μm, the process comprising the steps of introducing carbon dioxide into a milk of lime containing a first...
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5792440 |
Method of manufacturing high purity calcium carbonate
Flue gases exhausted from a lime kiln containing lime kiln dust are treated to produce a high purity calcium carbonate precipitate. This is accomplished by passing the flue gases from the lime kiln...
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5783038 |
Ink jet recording paper incorporating novel precipitated calcium carbonate pigment
An improved thermal ink jet recording paper, incorporating heat aged precipitated calcium carbonate ("PCC") and a binder, is disclosed. Heat aging the PCC in the presence of an organophosphonate...
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5779464 |
Calcium carbonate sorbent and methods of making and using same
A novel CaCO 3 sorbent with its physical properties tailored for high SO 2 removal is produced in accordance with the present invention. The surface area, porosity and the distribution of pore...
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